100 Doors Parallel Worlds Level 49 Walkthrough is shown below with screenshots. The answer is explained in detail in the text. Look at the screenshots for more help. If you only want to look at part of the guide and not cheat, just look at part of the solution. This will help you go to the next door.
1. Find the symbols in between the numbers to make 8. 8 = 1 - 4 + 9 - 1 + 3 -,+,-,+